I'm hoping somebody can answer what I think is a basic Gradle/Proguard
question.
I have a very basic Android project. This project contains the main app
module, named app, and a library module for the Android Support libraries,
named AndroidSupport.
I wish to run Proguard exclusively on AndroidSupport (i.e. NOT on the
overall application) because I'm having trouble running instrumentation
tests on the application when it is Proguard-ed. My hope is that I can
minify AndroidSupport on its own so that I don't need to Proguard my
application code (and thus, avoid the problem of tests not running).
Here's my app build.gradle. Note that Proguard is DISABLED:
apply plugin: 'com.android.application'
android {
compileSdkVersion 22
buildToolsVersion "22.0.1"
defaultConfig {
applicationId "com.example.androidsupportlibproject"
minSdkVersion 9
targetSdkVersion 22
versionCode 1
versionName "1.0"
}
buildTypes {
debug {
minifyEnabled false //Proguard DISABLED
proguardFiles getDefaultProguardFile('proguard-android.txt'),
'proguard-rules.pro'
}
}}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile project(':AndroidSupport')}
My AndroidSupport module has Proguard ENABLED:
apply plugin: 'com.android.library'
android {
compileSdkVersion 22
buildToolsVersion "22.0.1"
defaultConfig {
minSdkVersion 9
targetSdkVersion 22
}
buildTypes {
release {
minifyEnabled true //Proguard ENABLED
proguardFiles getDefaultProguardFile('proguard-android.txt'),
'proguard-rules.pro'
}
}}
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:support-v4:22.2.0'
compile 'com.android.support:appcompat-v7:22.2.0'
compile 'com.android.support:recyclerview-v7:22.2.0'
compile 'com.android.support:support-annotations:22.2.0'}
My AndroidSupport module's proguard-rules.pro looks like:
-dontobfuscate-keep class android.support.v4.** { *; }-keep interface
android.support.v4.app.** { *; }
When the app application has Proguard enabled and AndroidSupport has
Proguard disabled, I can use consumerProguardFiles proguard-rules.pro to
minify AndroidSupport.
But when I use the above pasted configuration, I get the following error:
Error:Execution failed for task ':AndroidSupport:proguardRelease'.
java.io.IOException: The output jar is empty. Did you specify the proper
'-keep' options?`
Does anyone know if this set up is possible? To enable Proguard ONLY on a
dependent library module, but not on the application itself?
Thanks in advance!
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